词典释义：
a slope or inclined plane for joining two different levels, as at the entrance or between floors of a building
（建筑物入口处或不同层面间的）斜面，斜坡
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a wheelchair ramp .轮椅用斜坡。
a movable set of steps for entering or leaving an aircraft
（供上下飞机使用的）活动舷梯，轻便梯。
〈英〉 （路面上为强制车辆减速而采用的）小凸面。
〈北美〉 （大道或高速公路的）（上、下）匝道
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an exit ramp .驶出匝道。
an upward bend in a stair rail
（楼梯扶手的）弯子，弯斜段。
an electrical waveform in which the voltage increases or decreases linearly with time
斜坡波形，锯齿波形。
〈英，非正式〉 诈骗，敲诈（尤指涉及股价诈涨的诈骗或敲诈）。[ORIGIN: see sense 4 of the verb.]
[with obj.]provide or build (something) with a ramp
为…提供（或建造）斜面（或斜坡）。
[no obj.]
〈古〉 （动物）前肢腾空而起。
[with adverbial of direction]rush about violently or uncontrollably
横冲直撞，暴跳。
[with adverbial of direction](of a plant)grow or climb luxuriantly
（植物）蔓生，蔓延
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ivy ramped over the flower beds .常春藤疯长到花坛上。
[no obj.](of an electrical waveform)increase or decrease voltage linearly with time
（电子波形）电压随时间增减。
[no obj.][usu. as noun
〈英〉 （为哄抬股价）购进股票（或证券）。[ORIGIN: late 20th cent.: of unknown origin; a 19th-cent. slang use of the term was ‘rob, swindle’.]
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ramp something up （或ramp up ） （especially in reference to the production of goods） increase or cause to increase in amount （尤指商品生产）（使）扩大生产they ramped up production to meet booming demand . 他们扩大生产以满足迅速增长的需求
"Middle English （as a verb in the sense ‘rear up', also used as a heraldic term）： from Old French
